Insufficient memory on EC2 during a Jenkins builds. Adjust the infrastructure

[LyashenkoGS]

The application is deployed on an EC2 micro instance (1GB Ram).
Currently EC2 serves

• Jenkins
• Docker
• MongoDB
• MongoDB web UI (Mongo express)

To fix:

• disable MongoDB UI
• if this will not help -> disable a MongoDB

To prevent such things:

• Setup Jenkins email notifications on a build fail
• Setup Zabbix based monitoring. Zabbix server and agents installation process should be automated by ansible playbooks.
• Research possibility to switch to AWS container service. Consider a need in a MongoDB, preferably installed on an EC2.
  A screenshot after a build fail due to insuficcient memmory size that shows the application ~200mb and jenkins ~300mb RAM

[LyashenkoGS]

Fixed the build. There was no running MongoDB, nor mongo-express. Usage of the memory by Jenkins process was about 34%. I restarted the process and rerun the build manually

[LyashenkoGS]

Jenkins notifications have been set-up using extended e-mail notifications plugin.

[LyashenkoGS]

Not relevant any-more because of switching to own server with proper amount of resources